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/*====================================================================*
 *
 *   Copyright (c) 2013 Qualcomm Atheros, Inc.
 *
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or 
 *   without modification, are permitted (subject to the limitations 
 *   in the disclaimer below) provided that the following conditions 
 *   are met:
 *
 *   * Redistributions of source code must retain the above copyright 
 *     notice, this list of conditions and the following disclaimer.
 *
 *   * Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the following 
 *     disclaimer in the documentation and/or other materials 
 *     provided with the distribution.
 *
 *   * Neither the name of Qualcomm Atheros nor the names of 
 *     its contributors may be used to endorse or promote products 
 *     derived from this software without specific prior written 
 *     permission.
 *
 *   NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE 
 *   GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE 
 *   COPYRIGHT HOLDERS AND CONTRIBUTORS &quot;AS IS&quot; AND ANY EXPRESS OR 
 *   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
 *   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 *   PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 
 *   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
 *   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 *   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 *   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 *   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
 *   OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
 *   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
 *
 *--------------------------------------------------------------------*/

/*====================================================================*
 *
 *   PLCTopology.c
 *
 *   plc.h
 *
 *
 *   Contributor(s):
 *      Charles Maier &lt;cmaier@qca.qualcomm.com&gt;
 *      Matthieu Poullet &lt;m.poullet@avm.de&gt;
 *
 *--------------------------------------------------------------------*/

#ifndef PLCTOPOLOGY_SOURCE
#define PLCTOPOLOGY_SOURCE

#include &lt;memory.h&gt;
#include &lt;errno.h&gt;

#include &quot;../tools/memory.h&quot;
#include &quot;../tools/symbol.h&quot;
#include &quot;../tools/error.h&quot;
#include &quot;../tools/flags.h&quot;
#include &quot;../plc/plc.h&quot;

/*====================================================================*
 *
 *   signed PLCPlatform (struct channel * channel, struct plcstation * station);
 *
 *   populate plcstation structure with hardware and firmware version
 *   string using a VS_SW_VER message;
 *
 *   extern char const * chipset [] contains chipset name strings in
 *   order of chipset code but function chipset() must be called to
 *   insert the true code into the confirmation message because some
 *   chipsets return the wrong code; alien technology and voodoo are
 *   needed;
 *
 *--------------------------------------------------------------------*/

static signed PLCPlatform (struct channel * channel, struct plcstation * plcstation)

{
	struct message message;
	ssize_t packetsize;

#ifndef __GNUC__
#pragma pack (push,1)
#endif

	struct __packed vs_sw_ver_request
	{
		struct ethernet_hdr ethernet;
		struct qualcomm_hdr qualcomm;
	}
	* request = (struct vs_sw_ver_request *) (&amp;message);
	struct __packed vs_sw_ver_confirm
	{
		struct ethernet_hdr ethernet;
		struct qualcomm_hdr qualcomm;
		uint8_t MSTATUS;
		uint8_t MDEVICE;
		uint8_t MLENGTH;
		char MSTRING [0x80];
	}
	* confirm = (struct vs_sw_ver_confirm *) (&amp;message);

#ifndef __GNUC__
#pragma pack (pop)
#endif

	memset (&amp;message, 0, sizeof (message));
	EthernetHeader (&amp;request-&gt;ethernet, plcstation-&gt;MAC, channel-&gt;host, channel-&gt;type);
	QualcommHeader (&amp;request-&gt;qualcomm, 0, (VS_SW_VER | MMTYPE_REQ));
	if (sendpacket (channel, &amp;message, (ETHER_MIN_LEN - ETHER_CRC_LEN)) &gt; 0)
	{
		while ((packetsize = readpacket (channel, &amp;message, sizeof (message))) &gt; 0)
		{
			if (!UnwantedMessage (&amp;message, packetsize, 0, (VS_SW_VER | MMTYPE_CNF)))
			{
				chipset (confirm);
				strncpy (plcstation-&gt;hardware, chipsetname (confirm-&gt;MDEVICE), sizeof (plcstation-&gt;hardware));
				strncpy (plcstation-&gt;firmware, confirm-&gt;MSTRING, sizeof (plcstation-&gt;firmware));
				return (0);
			}
		}
	}
	return (-1);
}

/*====================================================================*
 *
 *   signed PLCIdentity (struct channel * channel, struct plcstation * station);
 *
 *   populate plcstation structure with the device identity using a
 *   VS_MFG_STRING message;
 *
 *--------------------------------------------------------------------*/

static signed PLCIdentity (struct channel * channel, struct plcstation * plcstation)

{
	struct message message;
	ssize_t packetsize;

#ifndef __GNUC__
#pragma pack (push,1)
#endif

	struct __packed vs_mfg_string_request
	{
		struct ethernet_hdr ethernet;
		struct qualcomm_hdr qualcomm;
	}
	* request = (struct vs_mfg_string_request *) (&amp;message);
	struct __packed vs_mfg_string_confirm
	{
		struct ethernet_hdr ethernet;
		struct qualcomm_hdr qualcomm;
		uint8_t MSTATUS;
		uint8_t MLENGTH;
		char MSTRING [0x40];
	}
	* confirm = (struct vs_mfg_string_confirm *) (&amp;message);

#ifndef __GNUC__
#pragma pack (pop)
#endif

	memset (&amp;message, 0, sizeof (message));
	EthernetHeader (&amp;request-&gt;ethernet, plcstation-&gt;MAC, channel-&gt;host, channel-&gt;type);
	QualcommHeader (&amp;request-&gt;qualcomm, 0, (VS_MFG_STRING | MMTYPE_REQ));
	if (sendpacket (channel, &amp;message, (ETHER_MIN_LEN - ETHER_CRC_LEN)) &gt; 0)
	{
		while ((packetsize = readpacket (channel, &amp;message, sizeof (message))) &gt; 0)
		{
			if (!UnwantedMessage (&amp;message, packetsize, 0, (VS_MFG_STRING | MMTYPE_CNF)))
			{
				strncpy (plcstation-&gt;identity, confirm-&gt;MSTRING, sizeof (plcstation-&gt;identity));
				return (0);
			}
		}
	}
	return (-1);
}

/*====================================================================*
 *
 *   signed PLCTopology (struct channel * channel, struct message * message, struct plctopology * plctopology)
 *
 *   populate a plctopology structure with network information; the
 *   logic this is elusive due to the way the VS_NW_INFO message is
 *   structured;
 *
 *   the host can have many interfaces and each interface can have
 *   many powerline devices connected to it; each powerline device
 *   can bridge to an independent powerline network having a unique
 *   set of member devices; alternately, some powerline devices can
 *   be members of the same powerline network;
 *
 *   INT6x00 chipsets have an 8-bit PHY rate while AR7x00 chipsets
 *   have a 16-bit PHY rate; this means that AR7x00 PHY rates need
 *
 *--------------------------------------------------------------------*/

signed PLCTopology (struct channel * channel, struct message * message, struct plctopology * plctopology)

{
	ssize_t packetsize;

#if defined(INT6x00)

	struct __packed vs_nw_info_request
	{
		struct ethernet_hdr ethernet;
		struct qualcomm_hdr qualcomm;
	}
	* request = (struct vs_nw_info_request *)(message);
	struct __packed vs_nw_info_confirm
	{
		struct ethernet_hdr ethernet;
		struct qualcomm_hdr qualcomm;
		uint8_t data [1];
	}
	* confirm = (struct vs_nw_info_confirm *)(message);
	struct __packed station
	{
		uint8_t MAC [ETHER_ADDR_LEN];
		uint8_t TEI;
		uint8_t BDA [ETHER_ADDR_LEN];
		uint8_t AVGTX;
		uint8_t AVGRX;
	}
	* station;
	struct __packed network
	{
		uint8_t NID [7];
		uint8_t SNID;
		uint8_t TEI;
		uint8_t ROLE;
		uint8_t CCO_MAC [ETHER_ADDR_LEN];
		uint8_t CCO_TEI;
		uint8_t NUMSTAS;
		struct station stations [1];
	}
	* network;
	struct __packed networks
	{
		uint8_t NUMAVLNS;
		struct network networks [1];
	}
	* networks = (struct networks *) (confirm-&gt;data);

#elif defined (AR7x00)

	struct __packed vs_nw_info_request
	{
		struct ethernet_hdr ethernet;
		struct qualcomm_fmi qualcomm;
	}
	* request = (struct vs_nw_info_request *)(message);
	struct __packed vs_nw_info_confirm
	{
		struct ethernet_hdr ethernet;
		struct qualcomm_fmi qualcomm;
		uint8_t SUB_VERSION;
		uint8_t Reserved;
		uint16_t DATA_LEN;
		uint8_t DATA [1];
	}
	* confirm = (struct vs_nw_info_confirm *)(message);
	struct __packed station
	{
		uint8_t MAC [ETHER_ADDR_LEN];
		uint8_t TEI;
		uint8_t Reserved [3];
		uint8_t BDA [ETHER_ADDR_LEN];
		uint16_t AVGTX;
		uint8_t COUPLING;
		uint8_t Reserved3;
		uint16_t AVGRX;
		uint16_t Reserved4;
	}
	* station;
	struct __packed network
	{
		uint8_t NID [7];
		uint8_t Reserved1 [2];
		uint8_t SNID;
		uint8_t TEI;
		uint8_t Reserved2 [4];
		uint8_t ROLE;
		uint8_t CCO_MAC [ETHER_ADDR_LEN];
		uint8_t CCO_TEI;
		uint8_t Reserved3 [3];
		uint8_t NUMSTAS;
		uint8_t Reserved4 [5];
		struct station stations [1];
	}
	* network;
	struct __packed networks
	{
		uint8_t Reserved;
		uint8_t NUMAVLNS;
		struct network networks [1];
	}
	* networks = (struct networks *) (confirm-&gt;DATA);

#else
#error &quot;Unspecified Atheros chipset&quot;
#endif

	struct plcnetwork * plcnetwork = (struct plcnetwork *)(&amp;plctopology-&gt;plcnetwork);
	struct plcstation * plcstation;
	byte bridges [255] [ETHER_ADDR_LEN];
	unsigned bridge = LocalDevices (channel, message, bridges, (size_t)(sizeof (bridges)));
	while (bridge--)
	{
		memset (message, 0, sizeof (* message));
		memcpy (channel-&gt;peer, bridges [bridge], sizeof (channel-&gt;peer));

#if defined (INT6x00)

		EthernetHeader (&amp;request-&gt;ethernet, channel-&gt;peer, channel-&gt;host, channel-&gt;type);
		QualcommHeader (&amp;request-&gt;qualcomm, 0, (VS_NW_INFO | MMTYPE_REQ));

#elif defined (AR7x00)

		EthernetHeader (&amp;request-&gt;ethernet, channel-&gt;peer, channel-&gt;host, channel-&gt;type);
		QualcommHeader1 (&amp;request-&gt;qualcomm, 1, (VS_NW_INFO | MMTYPE_REQ));

#else
#error &quot;Unspecified Atheros chipset&quot;
#endif

		if (sendpacket (channel, message, (ETHER_MIN_LEN - ETHER_CRC_LEN)) &lt;= 0)
		{
			error (1, errno, CHANNEL_CANTSEND);
		}
		while ((packetsize = readpacket (channel, message, sizeof (* message))) &gt; 0)
		{

#if defined (INT6x00)

			if (UnwantedMessage (confirm, packetsize, 0, (VS_NW_INFO | MMTYPE_CNF)))

#elif defined (AR7x00)

			if (UnwantedMessage (confirm, packetsize, 1, (VS_NW_INFO | MMTYPE_CNF)))

#else
#error &quot;Unspecified Atheros chipset&quot;
#endif

			{
				continue;
			}
			network = (struct network *)(&amp;networks-&gt;networks);
			plcstation = (struct plcstation *)(&amp;plcnetwork-&gt;plcstation);
			memset (plcnetwork, 0, sizeof (* plcnetwork));
			memset (plcstation, 0, sizeof (* plcstation));
			plcstation-&gt;LOC = !memcmp (confirm-&gt;ethernet.OSA, bridges [bridge], sizeof (confirm-&gt;ethernet.OSA));
			plcstation-&gt;CCO = !memcmp (confirm-&gt;ethernet.OSA, network-&gt;CCO_MAC, sizeof (confirm-&gt;ethernet.OSA));
			plcstation-&gt;TEI = network-&gt;TEI;
			memcpy (plcstation-&gt;MAC, confirm-&gt;ethernet.OSA, sizeof (plcstation-&gt;MAC));
			memcpy (plcstation-&gt;BDA, confirm-&gt;ethernet.ODA, sizeof (plcstation-&gt;BDA));
			PLCPlatform (channel, plcstation);
			plcnetwork-&gt;plcstations++;
			plcstation++;
			while (networks-&gt;NUMAVLNS--)
			{
				station = (struct station *)(&amp;network-&gt;stations);
				while (network-&gt;NUMSTAS--)
				{
					memset (plcstation, 0, sizeof (* plcstation));
					plcstation-&gt;LOC = !memcmp (station-&gt;BDA, channel-&gt;host, sizeof (station-&gt;BDA));
					plcstation-&gt;CCO = !memcmp (station-&gt;MAC, network-&gt;CCO_MAC, sizeof (station-&gt;MAC));
					plcstation-&gt;TEI = station-&gt;TEI;
					memcpy (plcstation-&gt;MAC, station-&gt;MAC, sizeof (plcstation-&gt;MAC));
					memcpy (plcstation-&gt;BDA, station-&gt;BDA, sizeof (plcstation-&gt;BDA));

#if defined (INT6x00)

					plcstation-&gt;TX = station-&gt;AVGTX;
					plcstation-&gt;RX = station-&gt;AVGRX;

#elif defined (AR7x00)

					plcstation-&gt;TX = LE16TOH (station-&gt;AVGTX);
					plcstation-&gt;RX = LE16TOH (station-&gt;AVGRX);

#else
#error &quot;Unspecified Atheros chipset&quot;
#endif

					PLCPlatform (channel, plcstation);
					PLCIdentity (channel, plcstation);
					plcnetwork-&gt;plcstations++;
					plcstation++;
					station++;
				}
				plctopology-&gt;plcnetworks++;
				plcnetwork = (struct plcnetwork *)(plcstation);
				network = (struct network *)(station);
			}
		}
	}
	return (0);
}

/*====================================================================*
 *
 *--------------------------------------------------------------------*/

#endif


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